Matching lamp base for Poole Freeform vase

It seems like ages ago when I did a blogpost on a Poole Freeform vase from the 1950s. Remember this:  Poole Freeform vase. 

Here is a matching item that I have had displayed with the vase. This item is actually a lamp base but I think it looks more elegant displayed without any of the fittings. The design is hand-painted, I think by Gwen Haskins, and I have an idea that it dates from the late 1950s or early 1960s.